git.maemo.org Git - qtrapids/blob - src/plugins/searchplugin/DownloadManager.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2010 by Ixonos Plc   *
   3  *                                                                         *
   4  *   This program is free software; you can redistribute it and/or modify  *
   5  *   it under the terms of the GNU General Public License as published by  *
   6  *   the Free Software Foundation; version 2 of the License.               *
   7  *                                                                         *
   8  *   This program is distributed in the hope that it will be useful,       *
   9  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  10  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  11  *   GNU General Public License for more details.                          *
  12  *                                                                         *
  13  *   You should have received a copy of the GNU General Public License     *
  14  *   along with this program; if not, write to the                         *
  15  *   Free Software Foundation, Inc.,                                       *
  16  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  17  ***************************************************************************/
  18
  19 #include <QDebug>
  20
  21 #include "DownloadManager.h"
  22
  23
  24 DownloadManager::DownloadManager(QObject *parent) :
  25         QObject(parent) // Superclass construct
  26 {
  27 }
  28
  29 DownloadManager::DownloadManager(QUrl url, QString outfile, QObject *parent) :
  30         QObject(parent), // Superclass construct
  31         url_(url),
  32         filepath_(outfile),
  33         file_(QString(outfile))
  34 {
  35         file_.open(QIODevice::WriteOnly);
  36 }
  37
  38
  39 DownloadManager::~DownloadManager()
  40 {
  41         file_.close();
  42         delete reply_; reply_ = NULL;
  43 }
  44
  45
  46 void DownloadManager::start()
  47 {
  48         reply_ = manager_.get(QNetworkRequest(url_));
  49
  50         connect(reply_, SIGNAL(readyRead()), this, SLOT(on_readyRead()));
  51         connect(reply_, SIGNAL(downloadProgress (qint64 , qint64)), SLOT(on_downloadProgress(qint64, qint64)));
  52         connect(reply_, SIGNAL(finished()), this, SLOT(on_replyFinished()));
  53 }
  54
  55
  56 void DownloadManager::on_readyRead()
  57 {
  58         //qDebug() << "on_readyRead()";
  59         if(!WriteToFile()) {
  60                 qWarning() << "DownloadManager::on_readyRead(): Writing to file: "
  61                         << filepath_ << " failed.";
  62         }
  63 }
  64
  65 void DownloadManager::on_downloadProgress(qint64 bytesReceived, qint64 bytesTotal)
  66 {
  67         static double last = 0;
  68
  69         double prog = static_cast<double>(bytesReceived) / static_cast<double>(bytesTotal);
  70         if ((prog-last) >= 0.01) {
  71                 last = prog;
  72                 emit progress(static_cast<int>(100*prog));
  73         } else if (bytesReceived == bytesTotal) {
  74                 emit progress(100);
  75         }
  76
  77 }
  78
  79 void DownloadManager::on_replyFinished()
  80 {
  81         WriteToFile();
  82         file_.close();
  83         emit finished(filepath_);
  84 }
  85
  86
  87 bool DownloadManager::WriteToFile()
  88 {
  89         QByteArray readData = reply_->readAll();
  90
  91         if (readData.isEmpty()) {
  92                 qDebug() << "on_replyFinished(): No data available for reading";
  93         } else {
  94                 // If writing failed, see error message.
  95                 if (file_.write(readData) == -1) {
  96                         qWarning() << file_.error();
  97                         return false;
  98                 }
  99         }
 100         return true;
 101 }